Cl3Ti
Natta, G.Corradini, P.Allegra, G.
Journal of Polymer Science (1961) 51, 156 399-410
a=6.27Å b=6.27Å c=5.82Å
α=90° β=90° γ=120°
a=6.14Å b=6.14Å c=17.4Å